package com.example.demo.utils;

import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.BeanUtils;

/**
 * @author jack 对象转换
 */
public class DiyBeanUtils extends BeanUtils {


  /**
   * 将entityList转换成modelList
   *
   * @param fromList
   * @param tClass
   * @param <F>
   * @param <T>
   * @return
   */
  public static <F, T> List<T> entityListToModelList(List<F> fromList, Class<T> tClass) {
    if (fromList.isEmpty() || fromList == null) {
      return null;
    }
    List<T> tList = new ArrayList<>();
    for (F f : fromList) {
      T t = entityToModel(f, tClass);
      tList.add(t);
    }
    return tList;
  }

  private static <F, T> T entityToModel(F entity, Class<T> modelClass) {
    Object model = null;
    if (entity == null || modelClass == null) {
      return null;
    }

    try {
      model = modelClass.newInstance();
    } catch (InstantiationException e) {
      System.err.println("entityToModel : 实例化异常");
    } catch (IllegalAccessException e) {
      System.err.println("entityToModel : 安全权限异常");
    }
    BeanUtils.copyProperties(entity, model);
    return (T) model;
  }


}
